FC first checks

OLED display causes I2C to get many errors, and eventually system freezes.

Gonna try this fix. (Does not work. It's low priority, anyway.

Powered 5V from an old PC PS. FC is dead :( :(

Got a new one.

Update 16-Oct-2017: Every essential component already at home. The only pending one is the PWD+OSD board. I can't wait to see my QC doing something, so I'm assembling it using a PDB with 12 and 5 DCV regulator. I will replace it with the OSD one some time later.